The evil eye is the fascinum, it is that which has the effect of arresting movement and, literally, of killing life. At the moment the subject stops, suspending his gesture, he is mortified. This anti-life, anti-movement function of the terminal point is the fascinum, and it is precisely one of the dimensions in which the power of the gaze is exercised directly.
Henry Ford didn't just create a cheap way of getting away from your in-laws; he basically understood that there was something in us as a culture that wanted to be on the move, that wanted to get out.